From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from smtp.codeaurora.org ([198.145.29.96]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1hLNLX-0000cQ-0V for ath10k@lists.infradead.org; Tue, 30 Apr 2019 07:38:36 +0000 MIME-Version: 1.0 Date: Tue, 30 Apr 2019 13:08:33 +0530 From: Tamizh chelvam Subject: Re: [PATCHv5 1/9] nl80211: New netlink command for TID specific configuration In-Reply-To: References: <1553592550-15282-1-git-send-email-tamizhr@codeaurora.org> <1553592550-15282-2-git-send-email-tamizhr@codeaurora.org> Message-ID: List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "ath10k" Errors-To: ath10k-bounces+kvalo=adurom.com@lists.infradead.org To: Johannes Berg Cc: linux-wireless@vger.kernel.org, ath10k@lists.infradead.org >> +enum ieee80211_tid_conf_mask { >> + IEEE80211_TID_CONF_NOACK = BIT(0), >> +}; >> + >> +/** >> + * struct ieee80211_tid_cfg - TID specific configuration >> + * @tid: TID number >> + * @tid_conf_mask: bitmap indicating which parameter changed >> + * see %enum ieee80211_tid_conf_mask >> + * @noack: noack configuration value for the TID >> + */ >> +struct ieee80211_tid_cfg { >> + u8 tid; >> + enum ieee80211_tid_conf_mask tid_conf_mask; > > This shouldn't use the enum type if it's a bitmap. Doing the enum type > above is only useful for documentation, which you should add there. > Okay. I will change this to u32. >> + * @set_tid_config: TID specific configuration. Apply this >> configuration for >> + * all the connected stations in the BSS if peer is NULL. Otherwise > > %NULL renders better, IIRC > Sure. >> + * @NL80211_ATTR_TID_CONFIG: TID specific configuration in a >> + * nested attribute with %NL80211_ATTR_TID_* sub-attributes. > > Please use NL80211_TID_ATTR_* to disambiguate the namespaces > Sure. >> +enum nl80211_tid_config { >> + NL80211_TID_CONFIG_DEFAULT, >> + NL80211_TID_CONFIG_ENABLE, >> + NL80211_TID_CONFIG_DISABLE, >> +}; > > > That could do with some documentation > Sure. >> + >> +/* enum nl80211_attr_tid_config - TID specific configuration. >> + * @NL80211_ATTR_TID_CONFIG_TID: a TID value (u8 attribute). > > See above - TID_ATTR_* is better. > >> + * @NL80211_ATTR_TID_CONFIG_NOACK: Configure ack policy for the TID. >> + * specified in %NL80211_ATTR_TID_CONFIG_TID. see %enum >> nl80211_tid_config. >> + * Its type is u8, if the peer MAC address is passed in >> %NL80211_ATTR_MAC, >> + * then the noack configuration is applied to the data frame for the >> tid >> + * to that connected station. This configuration is valid only for >> STA's >> + * current connection. i.e. the configuration will be reset to >> default when >> + * the station connects back after disconnection/roaming. >> + * when user-space does not include %NL80211_ATTR_MAC, then this > > please use tabs consistently > >> + * configuration should be treated as per-netdev configuration. >> + * This configuration will be cleared when the interface goes down >> and on >> + * the disconnection from a BSS. > > "goes down" is redundant then? Or do you mean that's for the AP case? > In AP case, if a station disconnects from AP then the configuration will be cleared for the station. Similarly in STA mode if it disconnected from the BSS then the configuration also will be cleared. >> +static const struct nla_policy >> +nl80211_attr_tid_config_policy[NL80211_ATTR_TID_CONFIG_MAX + 1] = { >> + [NL80211_ATTR_TID_CONFIG_TID] = { .type = NLA_U8 }, > > Shouldn't this use NLA_POLICY_RANGE() or MAX()? > To give option to apply configuration for all TIDs if the value is 255(likely). >> + [NL80211_ATTR_TID_CONFIG_NOACK] = >> + NLA_POLICY_MAX(NLA_U8, NL80211_TID_CONFIG_DISABLE), >> +}; >> + >> const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { >> [NL80211_ATTR_WIPHY] = { .type = NLA_U32 }, >> [NL80211_ATTR_WIPHY_NAME] = { .type = NLA_NUL_STRING, >> @@ -541,6 +548,8 @@ static int validate_ie_attr(const struct nlattr >> *attr, >> [NL80211_ATTR_PEER_MEASUREMENTS] = >> NLA_POLICY_NESTED(nl80211_pmsr_attr_policy), >> [NL80211_ATTR_AIRTIME_WEIGHT] = NLA_POLICY_MIN(NLA_U16, 1), >> + [NL80211_ATTR_TID_CONFIG] = >> + NLA_POLICY_NESTED(nl80211_attr_tid_config_policy), >> }; > > Great! :-) > >> /* policy for the key attributes */ >> @@ -13259,6 +13268,93 @@ static int >> nl80211_get_ftm_responder_stats(struct sk_buff *skb, >> return -ENOBUFS; >> } >> >> +static int parse_tid_conf(struct cfg80211_registered_device *rdev, >> + struct nlattr *attrs[], >> + struct ieee80211_tid_cfg *tid_conf, >> + const u8 *peer) >> +{ >> + tid_conf->tid = nla_get_u8(attrs[NL80211_ATTR_TID_CONFIG_TID]); > > You need to check that this is even present! > >> + size_of_conf = sizeof(struct ieee80211_tid_config) + >> + num_conf * sizeof(struct ieee80211_tid_cfg); > > use struct_size() Sure > >> + tid_conf = kzalloc(size_of_conf, GFP_KERNEL); >> + if (!tid_conf) >> + return -ENOMEM; >> + >> + tid_conf->n_tid_conf = num_conf; >> + >> + if (info->attrs[NL80211_ATTR_MAC]) >> + tid_conf->peer = nla_data(info->attrs[NL80211_ATTR_MAC]); >> + else >> + tid_conf->peer = NULL; > > No need to initialize to NULL after kzalloc() okay sure. > >> + nla_for_each_nested(tid, info->attrs[NL80211_ATTR_TID_CONFIG], >> + rem_conf) { >> + ret = nla_parse_nested(attrs, NL80211_ATTR_TID_CONFIG_MAX, tid, >> + NULL, NULL); >> + >> + if (ret) >> + goto bad_tid_conf; >> + >> + if (!attrs[NL80211_ATTR_TID_CONFIG_TID]) { >> + ret = -EINVAL; >> + goto bad_tid_conf; >> + } > > Oh, you check here. Perhaps easier to do inside though? Checked here since the parse_tid_conf function called after this check. > >> + { >> + .cmd = NL80211_CMD_SET_TID_CONFIG, >> + .doit = nl80211_set_tid_config, >> + .policy = nl80211_policy, > > The .policy field no longer exists. Sure, I will remove this > > johannes _______________________________________________ ath10k mailing list ath10k@lists.infradead.org http://lists.infradead.org/mailman/listinfo/ath10k